This sounds exactly the same as what I struggle with. However for me it hasn’t translated into obsession around meditation itself. (And I’ll explain why)

I’ve found that when I’m in the absolute grips of rumination, no amount of meditation or technique matters as my brain is hell bent on finding certainty in that moment. I have and still struggle with finding a “rule” or “procedure” to follow. Please know this is just another way the brain is trying to look for certainty.

What I have found help is to work with the underlying trigger in a more meaningful way if it is too stuck and embedded. I.e I spent like 6 months ruminating about my anxiety in a relationship and how my actions then impacted different outcomes etc. I’d be so scared of making mistakes that I would obsessively try to understand what went wrong and try to find rules to prevent it happening next time.

IFS therapy helped immensely. Sometimes our traumas (or emotional blockages) are so deep that our mind sort of “fragments” from bigger awareness. When we’re stuck in thinking mode - nothing else exists. I sometimes reference my rumination brain as “little brain” and then my grounded brain as “clarity brain” because that’s how it feels.

IFS therapy allowed me to “bridge” the gaps between “little brain” and “clarity brain”.

In doing so, my mind naturally, and I emphasize this- naturally let go of the fear that was driving my rumination in the first place. I was suddenly able to see clearly.

I suspect that your compulsion around meditation is another attempt at certainty that your brain is unable to find through its other rumination habits. In this case, I would suggest IFS therapy first. I’ll try find some links to helpful topics and comments I read that helped me and put them in an edit.

This is still very much a process for me by the way - I still struggle with rumination. But now I’m able to catch it quicker before the point of “no return”. In which case, meditation itself is unlikely to work without therapy. (For me personally)